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- •Bryophyta (mosses)A. Moss is actually thousands of tiny moss gametophytes. B. Each gametophyte is attached to the soul by rootlike structures called rhizoids- 1. Absorb water, 2. Serve as anchors. C. Have leaf like structures only one cell thick that carry out photosynthesis and absorb moisture.
- •Reproduction of Bryophyta1. Occasionally will produce eggs and sperm. 2. Forms a zygote which produces a stalklike sporophyte(2N). 3. Sporophyte forms a sporangium called a capsule which releases spores. 4. The spores grow into gametophytes (1N).
- •Bryophyta Cont'dSeldom grow large. Most lie close to the soil or bark of trees. No complex support or vascular system. Need water for reproduction. Sperm must swim to an egg. Can be found in moist cracks in desert. Reproduce during periods of moisture.
- 1.Anterior Pituitary1) Growth-cell growth and division esp. of muscle and bone. 2) Prolactin- milk production. 3) Thyroid Stimulating-controls secretion of hormones from thyroid gland; stimulates the thyroid gland to produce thyroxine which stimulates oxidative respiration. 4) Adrenocorticotropic-controls secretion of hormones from adrenal gland; some regulate glucose production or balance sodium and potassium. 5) Follicle stimulating-ovulation and sperm production. 6) Luteinizing-ovulation and testosterone.
- 2.Posterior Pituitary1) Anti diuretic hormone- reduces or retention of water the kidneys secrete. 2) Oxytocin- contracts uterine muscles during birth; contract cells to secrete milk.
- 3.Pineal GlandResponse to light conditions outside the body produce melatonin-affects sleep patterns, circadian rhythm.